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The Influence of Different Mining Modes on the Heat Extraction Performance of Hydrothermal Geothermal Energy

Author

Listed:
  • Jingchen Ma

    (Beijing Institute of Engineering Geology, Beijing 100048, China)

  • Zhe Liu

    (Beijing Institute of Engineering Geology, Beijing 100048, China)

  • Zhi Wang

    (Beijing Institute of Engineering Geology, Beijing 100048, China)

  • Shuai Guo

    (Beijing Institute of Engineering Geology, Beijing 100048, China)

  • Xian Liu

    (Beijing Institute of Engineering Geology, Beijing 100048, China)

  • Yibin Huang

    (School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China)

Abstract

Hydrothermal geothermal energy, as a widely distributed, large reserve and easily exploitable renewable source, can be used for both power generation and building heating. In this study, a numerical simulation of heat extraction performance is conducted based on monitoring well temperature data in a geothermal field in Xiong’an New Area. The effects of the reinjection temperature, injection flow rate, and reinjection rate on the outlet temperature and the reservoir temperature during a long-term operation are analyzed. The results indicate that the lower reinjection temperature can generate a critical disturbance scope for the thermal reservoir during the exploitation process. The impact scope on the thermal reservoir can reach 210.3 m at a reinjection temperature of 25 °C, which is not conducive to maintaining the outlet temperature of production wells in the long-term. The reinjection rate significantly affects both the horizontal and vertical temperature fields of the thermal reservoir. Under reinjection conditions of 30 °C and 40 kg/s, the horizontal and vertical impact scope of the thermal reservoir are 262.3 and 588.5 m, respectively. The reinjection rate is inversely related to the outlet temperature. A decrease from 100% to 70% in the reinjection rate can increase the outlet temperature by 4.21%. However, a decrease in the reinjection rate will lead to a decline in the groundwater level. Therefore, balancing the variation in outlet temperature and groundwater level is crucial in practical engineering.

Suggested Citation

  • Jingchen Ma & Zhe Liu & Zhi Wang & Shuai Guo & Xian Liu & Yibin Huang, 2024. "The Influence of Different Mining Modes on the Heat Extraction Performance of Hydrothermal Geothermal Energy," Energies, MDPI, vol. 17(8), pages 1-16, April.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:8:p:1922-:d:1377705
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    References listed on IDEAS

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    Cited by:

    1. Li, Mingqi & Shi, Yan & Chen, Hongxu & Liu, Chengcheng & Li, Hongchao, 2024. "Study on the heat transfer performance of coaxial casing heat exchanger for medium and deep geothermal energy in cold regions," Renewable Energy, Elsevier, vol. 237(PB).

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